Hey All!
Have not had time to read the whole thread so I apologize if this has already been written.
I am not a breeder. Also I don't think at the rate byb's are pumping out dogs we can safely say that cross breeding could ever be controlled if we made it "ok". It's already out of control.
Besides that I have been looking at the origin of pit bulls and staffies and such. I have read that pittys are a mix of old english bulldog (now extinct) and a terrier of some sort and that staffies are english bulldogs and manchester terriers? This may or may not be exactly right but we can tell that certain breeds have come from crosses. So there is the potential that someone will create a new breed that has a purpose. So essentially a cross. And not just an "oodle" to make a pet shop money!